电化学方法腐蚀原奥氏体晶界的研究  

An electrochemical etching method to reveal prior-austenite grain boundaries

作　　者：孙雪娇[1] 连福亮[1] 柳永宁[1] 朱杰武[1] 

机构地区：[1]西安交通大学金属材料强度国家重点试验室,陕西西安710049

出　　处：《金属热处理》2014年第1期132-136,共5页Heat Treatment of Metals

基　　金：国家自然科学基金(51271137)

摘　　要：研究了电化学腐蚀法对X80管线钢、调质态35CrMo钢、调质态45钢、GCr15轴承钢和超高碳钢5种钢原奥氏体晶界的显示效果。结果表明,采用配比为100 mL过饱和苦味酸+2 mL盐酸+0.5 g十二烷基苯磺酸钠+3 g硝酸钠的电解液,从开路电位沿阳极方向进行线性扫描,当扫描曲线进入钝化区时停止试验,得到的奥氏体晶界腐蚀效果最佳。电化学腐蚀法对5种试验钢的原奥氏体晶界均有良好的腐蚀效果,与常规化学腐蚀法相比,其操作过程简单,无需加热,无有毒气体散发,适用范围较广。An electrochemical etching method was investigated to reveal prior-austenite grain boundaries in X80 pipeline steel, quenched and tempered 35CrMo steel, quenched and tempered 45 steel, GCrl5 steel and ultrahigh carbon steel. The results show that, the prior-austenite grain boundaries can be shown clearly with electrolyte solution of 100 mL saturated aqueous picric acid, 2 mL hydrochloric acid, 0.5 g sodium dodecyl benzene sulfonate and 3 g sodium nitrate when the specimens are scanned towards anodic direction from open circuit potential to passive zone. The effect of electrochemical etching method on the prior-austenite grain boundaries of the five kinds of tested steels is very good. Comparing with traditional chemical etching, the electrochemical method has a simple operation process, does not need heating, has no toxic gas emissions, and has wider applicable range.

关 键 词：原奥氏体晶界 电化学腐蚀 阳极极化曲线 

分 类 号：TG142.1[一般工业技术—材料科学与工程]